CATEngine Parts

086-1781 Locking Fuel Cap — Cat 307 311

This locking fuel cap is designed to seal the fuel tank on Caterpillar equipment, preventing fuel theft and contamination. It is manufactured to meet stringent OEM quality standards, ensuring a secure fit and durable seal unlike a worn or damaged cap that may leak or fail to lock. Operators may notice fuel odors, visible fuel leaks around the filler neck, or the cap not latching securely when the original cap begins to fail.

Locking Fuel Cap – Part No 086-1781 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeFuel Cap
MaterialPlastic, Rubber
ApplicationFuel Tank System
Service LifeReplace as needed or annually
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing fuel cap is often a fuel odor around the machine or a loose fit. If ignored, the seal can degrade further, leading to potential fuel siphoning or increased contamination entering the fuel system. Unaddressed, this can result in fuel system issues and engine performance problems.

Installation Tip

Ensure the fuel tank filler neck is clean before installing the new cap to prevent debris from entering the tank. Do not overtighten the cap, as this can damage the seal or the threads.

Service Note

Inspect the fuel tank filler neck seal and surrounding area for any damage or wear when replacing the fuel cap.